A high-efficiency adjusting device and method for a three-roller skew rolling mill guide plate

Abstract

This invention belongs to the field of seamless metal composite tube forming technology, specifically relating to a high-efficiency adjustment device and method for a guide plate of a three-roll skew rolling mill. The high-efficiency adjustment device includes a slide block with arc-shaped sliders on both sides. These arc-shaped sliders slide within arc-shaped grooves, which are formed on the mill frame. Arc-shaped teeth are symmetrically arranged on both sides of the upper surface of the slide block, meshing with gears. The gears are mounted on a rotating shaft, which is installed in two bearing seats. The bearing seats are fixedly mounted on a support, which is bolted to the mill frame. One end of the rotating shaft passes through the mill frame and is fixedly connected to the output shaft of a motor. The motor is fixedly mounted on a support plate, which is bolted to the mill frame. This invention enables radial, circumferential, and axial adjustment of the guide plate's position, accommodating more complex rolling conditions, improving product quality, and producing a wider variety of seamless bimetallic composite tubes.

Description

Technical Field

[0001] This invention belongs to the field of seamless metal composite tube forming technology, specifically relating to a high-efficiency adjustment device and method for the guide plate of a three-roll skew rolling mill. Background Technology

[0002] With the rapid development of industrial technology, the performance requirements for seamless metal pipes under extreme conditions are becoming increasingly stringent. Although some alloy pipes can meet these requirements, they are expensive and difficult to manufacture. Seamless metal composite pipes are made by combining component metals, which can fully utilize the performance advantages of the component metals and reduce the use of special metals, greatly improving the cost-effectiveness of the product. Therefore, they are widely used in aerospace, oil extraction, transportation of corrosive chemical media, military industry, nuclear power and other fields.

[0003] Three-roll skew rolling is a rolling process for manufacturing tubes with localized loading and large length-to-diameter ratios, widely used in the production of seamless metal tubes. This process boasts numerous advantages, including process stability, continuous forming, and high production efficiency, making it one of the most promising technologies for producing seamless metal composite tubes. The main rolling mill consists of three rolls and three guide plates. The three rolls are spaced at 120° intervals within the main mill, with a guide plate between every two rolls. The rolls apply deformation pressure to the composite tube, while the guide plates guide and restrict this deformation. During rolling, the composite tube blank undergoes severe plastic deformation, becoming triangular in shape. In severe cases, the outer wall of the metal tube can be squeezed into the gap between the rolls and the guide plates, causing jamming. Furthermore, during the final composite stage, the lack of a rear section of the metal tube to restrict deformation leads to a severe tail-triangle phenomenon, also resulting in jamming. These issues severely limit production continuity and product quality. Adjusting the position of the guide plates between the rolls can effectively improve jamming, increasing production efficiency and product quality.

[0004] Currently available three-roll skew rolling mills rely mainly on screws and nuts for unidirectional movement of the guide plates, which requires manual operation and measurement. This results in low efficiency, limited spatial freedom, and an inability to avoid tail triangle and outer tube tearing phenomena in composite pipes of specific materials and wall thicknesses.

[0005] Therefore, in order to achieve continuous and efficient production, the efficient and high-precision position adjustment of the guide plate of the three-roll skew mill has become an urgent problem to be solved. Summary of the Invention

[0006] This invention addresses the aforementioned problems by providing a highly efficient adjustment device and method for the guide plate of a three-roll skew rolling mill.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A high-efficiency adjustment device for a guide plate of a three-roll skew rolling mill includes a slide block. An end cover is fixedly mounted on the upper surface of the slide block. A hydraulic motor is fixedly mounted on the upper surface of the end cover. The output shaft of the hydraulic motor passes through the end cover and is fixedly connected to a lead screw. A transmission block is threadedly connected to the lead screw. The transmission block is fixedly connected to a slide plate. A clearance hole is provided on the slide plate to allow the lead screw to move. The slide plate is slidably mounted inside the slide block. A guide plate base is connected to the lower end of the slide plate. A guide plate is connected to the lower end of the guide plate base. A pressure plate is fixedly connected to the front end face of the slide block by bolts. A locking cylinder is bolted to the pressure plate. The movable end of the locking cylinder abuts against the sliding plate. Arc-shaped sliders are provided on both the left and right sides of the slide block. The arc-shaped sliders slide within arc-shaped grooves, which are formed on the frame. Arc-shaped teeth are symmetrically arranged on the left and right sides of the upper surface of the slide block. The arc-shaped teeth mesh with gears, which are mounted on a rotating shaft. The rotating shaft is mounted in two bearing seats, which are fixedly mounted on a bracket. The bracket is fixedly mounted on the frame with bolts. One end of the rotating shaft passes through the frame and is fixedly connected to the output shaft of the motor. The motor is fixedly mounted on a support plate, which is fixedly mounted on the frame with bolts.

[0009] Furthermore, a hydraulic cylinder is provided at the outer end of the arc-shaped slider. The piston rod of the hydraulic cylinder is in contact with the outer end of the arc-shaped slider. The cylinder body of the hydraulic cylinder is installed in a support frame, which is fixed to the machine frame by bolts.

[0010] Furthermore, a pad is fixedly installed at the outer end of the arc-shaped slider to increase the contact area between the arc-shaped slider and the hydraulic cylinder.

[0011] Furthermore, the centers of the arc-shaped slider, arc-shaped groove, and arc-shaped teeth are all located on the rolling center line.

[0012] Furthermore, a first encoder and a second encoder are respectively installed on the output shafts of the hydraulic motor and the electric motor. Both the first encoder and the second encoder are connected to the control console and are used to detect the displacement distance of the slide and the swing angle of the slide block, respectively. The hydraulic cylinder has a built-in displacement sensor for detecting the displacement distance of the slide block. The control console is also connected to the hydraulic motor, the locking cylinder, the electric motor, and the hydraulic cylinder for controlling the operation of the hydraulic motor, the locking cylinder, the electric motor, and the hydraulic cylinder.

[0013] Furthermore, a bevel is provided on the end face of the guide plate that contacts the tube, and the bevel is located on the side near the rolling inlet.

[0014] Furthermore, grooves are provided on both the upper and lower arc surfaces of the arc-shaped slide groove, and rollers are installed in the grooves to reduce the friction between the arc-shaped slider and the arc-shaped slide groove.

[0015] A highly efficient adjustment method for the guide plate of a three-roll skew rolling mill includes radial position adjustment, circumferential position adjustment, and axial position adjustment, specifically as follows:

[0016] Radial position adjustment: The hydraulic motor is started via the control console. The hydraulic motor is controlled to rotate forward or backward according to the target position of the guide plate. The hydraulic motor drives the lead screw to rotate. As the lead screw rotates, the transmission block drives the slide plate and guide plate to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate is determined by the signal detected by the No. 1 encoder, and then it is determined whether the guide plate has moved to the target position. When the guide plate moves to the target position, the control console controls the hydraulic motor to stop working. Then, the locking cylinder is extended to lock and fix the slide plate to ensure its position is stable, thus completing the radial position adjustment of the guide plate.

[0017] Circumferential position adjustment: Adjust the hydraulic cylinder to the depressurized state via the control console, start the motor, and control the motor to rotate forward or backward according to the target angle of the guide plate. This drives the gear to rotate, and the arc-shaped teeth are displaced under the drive of the gear, which in turn causes the arc-shaped slider to move along the arc-shaped groove, ultimately achieving the angle adjustment of the guide plate. The angle of the guide plate is determined by the signal detected by the second encoder. When the guide plate is detected to have rotated to the target angle, the motor stops working, completing the circumferential position adjustment of the guide plate.

[0018] Axial position adjustment: Based on the target position of the guide plate, the hydraulic cylinder is controlled by the control console to move the slide block. During the displacement process, the extension / retraction length of the hydraulic cylinder is detected by the displacement sensor built into the hydraulic cylinder. When the guide plate reaches the target position, the arc-shaped slider is locked by the hydraulic cylinder to complete the axial position adjustment of the guide plate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention enables radial, circumferential, and axial adjustment of the guide plate position, which can cope with more complex rolling conditions, improve product quality, and produce more varieties of seamless bimetallic composite tubes.

[0021] The guide plate in this invention is provided with a bevel. When the composite tube is being laminated at the end, the guide plate is moved toward the outlet direction by adjusting the axial position of the guide plate, thereby releasing the constraint of the guide plate at the end of the composite tube and avoiding the jamming problem caused by large deformation due to the lack of subsequent restriction at the end of the composite tube.

[0022] This invention, through its equipped No. 1 encoder, No. 2 encoder, and displacement sensor built into the hydraulic cylinder, can accurately detect the position and angle of the guide plate, thereby achieving rapid, efficient, and high-precision adjustment of the guide plate position parameters, saving operation procedures, and greatly improving rolling efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure for adjusting a single guide plate according to the present invention;

[0025] Figure 3 This is a schematic diagram of the installation of the slide block and the slide plate in this invention;

[0026] Figure 4 This is a schematic diagram of the frame structure in this invention;

[0027] Figure 5 For the present invention Figure 4 A magnified view of a portion of circle A in the center;

[0028] In the diagram, 1 is a slide block, 2 is an end cap, 3 is a hydraulic motor, 4 is a lead screw, 5 is a transmission block, 6 is a slide plate, 7 is a guide plate base, 8 is a guide plate, 9 is a pressure plate, 10 is a locking cylinder, 11 is an arc-shaped slider, 12 is an arc-shaped slide groove, 13 is a frame, 14 is an arc-shaped tooth, 15 is a gear, 16 is a rotating shaft, 17 is a bearing seat, 18 is a bracket, 19 is a motor, 20 is a support plate, 21 is a hydraulic cylinder, 22 is a support frame, 23 is a pad, 24 is a bevel, and 25 is a roller. Detailed Implementation

[0029] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.

[0030] like Figures 1 to 5As shown, a high-efficiency adjustment device for a guide plate of a three-roll skew rolling mill includes a slide block 1. An end cover 2 is fixedly installed on the upper end face of the slide block 1. A hydraulic motor 3 is fixedly installed on the upper surface of the end cover 2. The output shaft of the hydraulic motor 3 passes through the end cover 2 and is fixedly connected to a lead screw 4. A transmission block 5 is threadedly connected to the lead screw 4. The transmission block 5 is fixedly connected to a slide plate 6. A clearance hole for the lead screw 4 is provided on the slide plate 6. The slide plate 6 is slidably installed in the slide block 1. A guide plate base 7 is connected to the lower end of the slide plate 6. A guide plate 8 is connected to the lower end of the guide plate base 7. A beveled notch 24 is provided on the end face of the guide plate 8 that contacts the pipe, and the beveled notch 24 is located on the side near the rolling inlet. A pressure plate 9 is fixedly connected to the front end face of the slide block 1 by bolts, and a locking cylinder 10 is connected to the pressure plate 9 by bolts. The movable end of the locking cylinder 10 abuts against the slide plate 6. Arc-shaped sliders 11 are provided on both the left and right sides of the slide block 1, and the arc-shaped sliders 11 slide within arc-shaped grooves 12. The arc-shaped grooves 12 are formed on the frame 13, and grooves are formed on both the upper and lower arc-shaped surfaces of the arc-shaped grooves 12. A roller 25 is installed in the groove to reduce the friction between the arc-shaped slider 11 and the arc-shaped slide 12. A hydraulic cylinder 21 is provided at the outer end of the arc-shaped slider 11, and the piston rod of the hydraulic cylinder 21 contacts the outer end of the arc-shaped slider 11. The cylinder body of the hydraulic cylinder 21 is installed in the support frame 22, which is fixed to the frame 13 by bolts. A pad 23 is fixedly provided at the outer end of the arc-shaped slider 11 to increase the contact area between the arc-shaped slider 11 and the hydraulic cylinder 21. Arc-shaped grooves are symmetrically arranged on the left and right sides of the upper surface of the slide block 1. The centers of the arc-shaped slider 11, arc-shaped groove 12, and arc-shaped tooth 14 are all located on the rolling center line. The arc-shaped tooth 14 is meshed with a gear 15. The gear 15 is mounted on a rotating shaft 16. The rotating shaft 16 is mounted in two bearing seats 17. The bearing seats 17 are fixedly mounted on a bracket 18. The bracket 18 is fixedly mounted on a machine frame 13 by bolts. One end of the rotating shaft 16 passes through the machine frame 13 and is fixedly connected to the output shaft of a motor 19. The motor 19 is fixedly mounted on a support plate 20. The support plate 20 is fixedly mounted on the machine frame 13 by bolts.

[0031] An encoder is installed on the output shaft of the hydraulic motor 3 and the motor 19 respectively. The encoder is connected to the control console and is used to detect the displacement distance of the slide plate 6 and the swing angle of the slide block 1 respectively. The hydraulic cylinder 21 has a built-in displacement sensor for detecting the displacement distance of the slide block 1. The control console is also connected to the hydraulic motor 3, the locking cylinder 10, the motor 19 and the hydraulic cylinder 21 for controlling the operation of the hydraulic motor 3, the locking cylinder 10, the motor 19 and the hydraulic cylinder 21.

[0032] A highly efficient adjustment method for the guide plate of a three-roll skew rolling mill includes radial position adjustment, circumferential position adjustment, and axial position adjustment, specifically as follows:

[0033] Radial position adjustment: The hydraulic motor 3 is started by the control console. The hydraulic motor 3 is controlled to rotate forward or backward according to the target position of the guide plate 8. The hydraulic motor 3 drives the lead screw 4 to rotate. As the lead screw 4 rotates, the transmission block 5 drives the slide plate 6 and the guide plate 8 to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate 8 is determined by the signal detected by the encoder, and then it is determined whether the guide plate 8 has moved to the target position. When the guide plate 8 moves to the target position, the control console controls the hydraulic motor 3 to stop working, and then controls the locking cylinder 10 to extend and lock the slide plate 6 to ensure its stable position, thus completing the radial position adjustment of the guide plate 8.

[0034] Circumferential position adjustment: The hydraulic cylinder 21 is adjusted to the depressurization state via the control console. The motor 19 is started and controlled to rotate forward or backward according to the target angle of the guide plate 8. This drives the gear 15 to rotate, and the arc-shaped tooth 14 is displaced under the drive of the gear 15. This causes the arc-shaped slider 11 to move along the arc-shaped slide groove 12, thus achieving the angle adjustment of the guide plate 8. The angle of the guide plate 8 is determined by the signal detected by the second encoder. When the guide plate 8 is detected to have rotated to the target angle, the motor 19 stops working, completing the circumferential position adjustment of the guide plate 8.

[0035] Axial position adjustment: Based on the target position of the guide plate 8, the hydraulic cylinder 21 is controlled by the control console to work, thereby pushing the slide 1 to move. During the movement, the extension / retraction length of the hydraulic cylinder 21 is detected by the displacement sensor built into the hydraulic cylinder 21. When the guide plate 8 is detected to have reached the target position, the arc-shaped slider 11 is locked by the hydraulic cylinder 21 to complete the axial position adjustment of the guide plate 8.

[0036] The foregoing has shown and described the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency adjustment device for the guide plate of a three-roll skew rolling mill, characterized in that: The slide includes a slide block (1), an end cap (2) is fixedly installed on the upper surface of the slide block (1), a hydraulic motor (3) is fixedly installed on the upper surface of the end cap (2), the output shaft of the hydraulic motor (3) passes through the end cap (2) and is fixedly connected to a lead screw (4), the lead screw (4) is threadedly connected to a transmission block (5), the transmission block (5) is fixedly connected to a slide plate (6), a clearance hole for the lead screw (4) is provided on the slide plate (6), the slide plate (6) is slidably installed in the slide block (1), a guide plate base (7) is connected to the lower end of the slide plate (6), a guide plate (8) is connected to the lower end of the guide plate base (7), a bevel (24) is provided on the end face of the guide plate (8) that contacts the tube, and the bevel (24) is located on the side near the rolling inlet, a pressure plate (9) is fixedly connected to the front end face of the slide block (1) by bolts, and a locking cylinder (10) is connected to the pressure plate (9) by bolts. The movable end of the locking cylinder (10) abuts against the slide plate (6). Arc-shaped sliders (11) are provided on both the left and right sides of the slide block (1). The arc-shaped sliders (11) slide in the arc-shaped groove (12). The arc-shaped groove (12) is opened on the frame (13). Arc-shaped teeth (14) are symmetrically arranged on the left and right sides of the upper surface of the slide block (1). The arc-shaped teeth (14) mesh with gears (15). The gears (15) are installed on the rotating shaft (16). The rotating shaft (16) is installed in two bearing seats (17). The bearing seats (17) are fixedly installed on the bracket (18). The bracket (18) is fixedly installed on the frame (13) by bolts. One end of the rotating shaft (16) passes through the frame (13) and is fixedly connected to the output shaft of the motor (19). The motor (19) is fixedly installed on the support plate (20). The support plate (20) is fixedly installed on the frame (13) by bolts.

2. The high-efficiency adjustment device for the guide plate of a three-roll skew rolling mill according to claim 1, characterized in that: A hydraulic cylinder (21) is provided at the outer end of the arc-shaped slider (11). The piston rod of the hydraulic cylinder (21) is in contact with the outer end of the arc-shaped slider (11). The cylinder body of the hydraulic cylinder (21) is installed in the support frame (22). The support frame (22) is fixed to the frame (13) by bolts.

3. The high-efficiency adjustment device for the guide plate of a three-roll skew rolling mill according to claim 2, characterized in that: A pad (23) is fixedly provided on the outer end of the arc-shaped slider (11) to increase the contact area between the arc-shaped slider (11) and the hydraulic cylinder (21).

4. The high-efficiency adjustment device for the guide plate of a three-roll skew rolling mill according to claim 1, characterized in that: The centers of the arc-shaped slider (11), arc-shaped groove (12), and arc-shaped tooth (14) are all located on the rolling center line.

5. The high-efficiency adjustment device for the guide plate of a three-roll skew rolling mill according to claim 2, characterized in that: An encoder is installed on the output shaft of the hydraulic motor (3) and the motor (19), respectively. The encoder is connected to the control console and is used to detect the displacement distance of the slide plate (6) and the swing angle of the slide block (1). The hydraulic cylinder (21) has a built-in displacement sensor to detect the displacement distance of the slide block (1). The control console is also connected to the hydraulic motor (3), the locking cylinder (10), the motor (19) and the hydraulic cylinder (21) to control the operation of the hydraulic motor (3), the locking cylinder (10), the motor (19) and the hydraulic cylinder (21).

6. The high-efficiency adjustment device for the guide plate of a three-roll skew rolling mill according to claim 1, characterized in that: Grooves are provided on both the upper and lower arc surfaces of the arc-shaped slide groove (12), and rollers (25) are installed in the grooves to reduce the friction between the arc-shaped slider (11) and the arc-shaped slide groove (12).

7. A method for efficiently adjusting a guide plate of a three-roll skew rolling mill using the efficient adjustment device for a guide plate of a three-roll skew rolling mill as described in claim 5, characterized in that: This includes radial position adjustment, circumferential position adjustment, and axial position adjustment, specifically: Radial position adjustment: Start the hydraulic motor (3) through the control console, control the hydraulic motor (3) to rotate forward or reverse according to the target position of the guide plate (8), drive the lead screw (4) to rotate through the hydraulic motor (3), and as the lead screw (4) rotates, the transmission block (5) drives the slide plate (6) and the guide plate (8) to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate (8) is determined by the signal detected by the No. 1 encoder, and then it is determined whether the guide plate (8) has moved to the target position. When the guide plate (8) moves to the target position, the control console controls the hydraulic motor (3) to stop working, and then controls the locking cylinder (10) to extend and lock the slide plate (6) to ensure its stable position, thus completing the radial position adjustment of the guide plate (8). Circumferential position adjustment: Adjust the state of the hydraulic cylinder (21) to the depressurization state through the control console, start the motor (19), control the motor (19) to rotate forward or backward according to the target angle of the guide plate (8), drive the gear (15) to rotate, the arc tooth (14) will be displaced under the drive of the gear (15), and then the arc slider (11) will move along the arc groove (12), and finally realize the angle adjustment of the guide plate (8). The angle of the guide plate (8) is determined by the signal detected by the second encoder. When the guide plate (8) is detected to rotate to the target angle, the motor (19) stops working, and the circumferential position adjustment of the guide plate (8) is completed. Axial position adjustment: According to the target position of the guide plate (8), the hydraulic cylinder (21) is controlled by the control console to work, thereby pushing the slide (1) to move. During the displacement process, the extension / retraction length of the hydraulic cylinder (21) is detected by the displacement sensor built into the hydraulic cylinder (21). When the guide plate (8) is detected to reach the target position, the arc-shaped slider (11) is locked by the hydraulic cylinder (21) to complete the axial position adjustment of the guide plate (8).

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